The action takes places in late 30's in a world ravaged by the Great World War which lasted 15 years. There was no real winner, the money was lacking so the nations decided to end it.
Accordingly, former soldiers, and especially pilots, were left to their fate and either organized
themselves into gangs or were hired by military-industrial corporations for their private militias.

You play one of them, Marcel Gaston, known as "La Moustache", former war hero, former race pilot, current delivery man who chose to keep away from the turmoil as far as possible.
Oh... and he is a heavy drinker.